Improvement in mortisimg-machines



WlLLI'AM DoWNINc- AND wrLLrAM H. s oLnY, or PHILADELPHLA, russ! vSYLVANlA,ASSIGNORS TO WESTFQBDAWARNER, Oli" SAME PLACE.

Letters .Patent No. 112,228, dated February 28, 1871.

EMMRQVEMENT EN MQRTiSlNG-MACHINES.

The Schedule referred to h1 these Letters Patent and making part of the sanne.

To all whom it may concern:

Be it known-that we, WILLIAM DOWNING and WILLLLM H. SOLEY, both of the city and county of' Philadelphia, 'in lthe State of Pennsylvania, have invented certain new and useful Improvements'in Mortising-Machines, of which the following is a specifical tion, reference being had to the accompanying drawl in section, of the same.

It is the object oi' our inventiou'to lcut andclear a moitse, or a series of mortises,simultaneously, of any desired width and length, and straight or tapering, as

required, so that the mortised stile onleaving the machine is ready for use without further inishing.

The irst part of our invention relates to the cutting mechanism, and embraces the construction thereof and the combination of its different parts with each other. The second part of our invention relates to the combination ofthe cutting mechanism with the .other parts of the machine. f

The main feature of the first part oi' our invention consists iuan endless chain-cutter, shown most fully in figs. 3 and 4, and hereinaiter described.

The second part of our invention consists in a gaugetable for feeding the stile upon the cutter, a clamping device for holding the stile in position, and a provision for cutting a mortise through any part of the length of the stilewith one cutter, or cutting aseries of mortises simultaneously by using any desired number of cutters.

Our improved mortising-machine is constructed as follows:

The twoend-pieces, A A', of the ii'ame afford a firm and steady support to the operating parts.`

A drum, B, mounted in hearings near the bottom of thc frame, is driven by suitable connections with the prime mover.

The cutter-shaft C is mounted in hearings c, which traverse in guides or ways D D' near the top of the frame, and may be secured at any point upon the Ways by set screws c', passing thrugh slots d in the ways, so as to bring the cutter under. any part of the stile to be mortised, or a series of cutter-sbatte may be similarly mounted at different points so astc cut a series of mortises simultaneously.

The cutter-shaft is driven from `the drum B by a quarter twist-belt, b, passing over a pulley, C', andthe length of the drum B is such as to allow it to carry a belt for each cutter-shaft, which may be mounted on the ways D D. 1

@ne end of the cutterfshaft projects beyond the guide D', and carries a driving-pulley, E, fig. 3, and a carrying-pulley, F, is mounicdahm'e in line therewith in a standard, G, secured to the adjacent bearing ol' the cutter-shaft. Any lost motion o'r wem-'ot' the cui ters upon the pulleysmay be takenup by senseless or other simple devices.

When straight mortises are to be out the drivingpullcy and the carrying-pulley are oi' equal diametels, or the carrying-pulley is larger than the di iving-pnlley.

When a tapering mortise is to lie-cut the carryingpulley is of less dialnetcr'than the driving-pulley, the' taper of themortise being increased as tliedialneter ofthe carrying-pulley is diminished. It is, therefore,

obvious that,l these conditions heilig observed, where a series of mortises are cut simultaneously theymaybe Aall straight or all tapering, or some straight and some tapering, or some tapering mme and some less, in proportion to the relative dierences of diameter between the carrying-pulleys and their respective driving-pulleys.

.chain is continuously iu contact "hy being curved'on its inner side in the segment of a circle, the diameter of which is equal to that of thedriving-pulley, andthechain is kept upon the pulleys and held iirm and true in the line of cut by grooves inthe puileys, into which tongues on the links enter, or 'lace corsa, the links being alternately single and double, as shown in the drawing, and the chain being driven only by its frictional contact with the drivingspulley E.

The thickness of the chain is equal to the width of the mortise which is to be cut, and the cutting-teeth are so disposed alongits outer surface as to make a following cut from edge to edge of. the mortise, (sce figs. 3 and 4,) that is to say, ive-deem it essential, and have found it so in the practical operation of this cutter, that there should not be at any part ofthe chain a directly .transverse line of teeth, the respective toothed andblank members which compose the links jacent and similar members, :Whether the. same be toothed or blank, will be inclined to. the longitudinf-.i

centerline of the chain, as shown most clearly in iig.-

The cutter H consists of an endless chain, composed 4, from which arrangement of the teeth it is obvious that the out is commenced by one member of a' double link, continued by a, single link, and completed by the opposite member of another double link, instead of having the teeth to act simultaneously across the Awhole width 0f the mortise cut.

The standard and pulleys must in no case project beyond the cha-in, as otherwise the passage of' the cntter through the mortise would be obstructed by such projection.

A sliding frame, I, traveling up and down in' the side-pieces A A' ot'v the main frame, and counterbalanced by weighted levers J J', carriesa slotted table,

K, through whichthe cutter projects distance equal tothe depth of the mortise to be cut.

At one end of this table isa kneefpiece, L, adjustable toward or from the cutter or cutters by means of a slot and set-screw, which,`\vhen fixed in position, serves as a. gauge and determines exactly and uniformly the point at which 'the niortise is out.

A shaft, M, is supported in proper bearings above the table K, and is providedvwth clamping-cams m,

which, when tuxned or screwed down npon the stile,

hold it in position agaiusttho upward pressureof 'the cutter-teeth.

By means of al treadie, t, the operator with his footdepresses the sliding frame, thus feeding the adjusted stile down uponthe cutter.-

The sliding frame 'being raised as shown in dotted lines in fig. 2, and thekriee-piece and cutter adj usted in position, the stile is clamped upon the table K, v resting against the knee-pieceIL, and motion being communicated to the cutter-shatt, the operator feeds the stile to the cnt-ter, which cntsand cleals a mortise, the dimensions of which depend upon the thickness ofthe cutter and the diameters ofthe pulleys, as hereinbeforc described v We do not wish to bc understood as claiming a iiexible chain-cutter of whatever form or however mounted, as we are aware that ceijtain constructions ot' such a device have heretofore been made; but

What we claim as our invention, and desire to secure Witnesses: v t

J. SNownEN Bum.,v GEORGE MILLER. 

